CN110847216A - Offshore wind power foundation with skirt board annular group cylinders - Google Patents
Offshore wind power foundation with skirt board annular group cylinders Download PDFInfo
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- CN110847216A CN110847216A CN201911311603.2A CN201911311603A CN110847216A CN 110847216 A CN110847216 A CN 110847216A CN 201911311603 A CN201911311603 A CN 201911311603A CN 110847216 A CN110847216 A CN 110847216A
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- annular
- skirt
- wind power
- foundation
- offshore wind
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
Abstract
The invention relates to an offshore wind power foundation with a skirt board and an annular group cylinder. High-pressure gas is injected into the suction tube to enable the suction tube to float on water, the friction resistance of the tube wall and the resistance of the tube end can be effectively reduced by the negative pressure penetration installation method of the suction tube, the effect of reducing the friction resistance of the tube wall by combining annular angle steel is achieved, and the installation efficiency of the foundation is greatly improved; compared with a conventional round cap-shaped foundation, the annular top cover ensures coordinated floating transportation and coordinated installation and leveling of the grouped cylinders while reducing steel consumption and foundation cost; the annular top cover avoids the adverse effect of huge jacking buoyancy on the middle area of the conventional circular top cover, and the overall stability of the foundation is enhanced; the apron board of annular top cap has effectively improved the bearing capacity of fan basis operation period, has guaranteed the stability of basis effectively when reducing basic design size, reduction cost.
Description
Technical Field
The invention relates to an offshore wind power foundation structure, in particular to an offshore wind power foundation with a skirt board annular group cylinder.
Background
Since the 21 st century, there has been a rapid increase in the global economy, accompanied by a rapid increase in the economy by a dramatic increase in energy consumption. Non-renewable energy represented by fossil fuels such as coal, petroleum, natural gas and the like is continuously consumed, and according to the evaluation of economic and socialists, petroleum energy is completely exploited by the middle of the century, and the world energy system faces a huge crisis. In order to deal with the energy crisis which may occur, the development and investment of renewable energy sources such as wind energy, photovoltaic energy, tidal energy, biological energy and the like are increased in various countries all over the world. In the development of renewable energy sources, wind power generation has the advantages of large reserves and wide distribution, so that the wind power generation becomes the key point of the development of new energy sources in the world at present. The development of wind farms is divided into onshore wind farms and offshore wind farms, depending on the location of the generator set arrangement. Compared with onshore wind power, offshore wind power has the advantages of high wind speed, stable wind direction, low turbulence intensity, low land cost, low energy transportation cost and the like, so that the construction of offshore wind power plants becomes the main direction of recent global energy development of all countries.
In offshore wind power construction, the investment of a fan foundation is huge, the existing offshore wind power foundation types are various in order to deal with complex offshore environments, and the main fan foundation types comprise a single-pile foundation, a composite cylindrical foundation, a jacket foundation and the like. The patent CN106049525A and the patent CN106436740A respectively invent polygonal and annular single-cylinder foundations, and the structural form is beneficial to the integrated installation of the whole wind turbine, but the structural form is only suitable for wind power plants with shallow water depth. With the increase of the depth of water of the offshore wind power plant, the jacket foundation becomes the best choice for the offshore wind power foundation of the current deep water area. The basic model selection of the jacket is the key to the current jacket design. Patent CN103981884A and patent CN103981883 propose a foundation structure compounded by a truss structure and three-cylinder type foundation and four-cylinder type foundation, which can effectively exert the bearing capacity of the cylinder type foundation, but in the transportation and installation stage, the truss structure cannot coordinate the leveling of the group cylinders, and the installation is difficult.
Disclosure of Invention
In order to solve the problems, the invention provides an offshore wind power foundation with an apron board annular group cylinder, which improves the installation efficiency, the bearing capacity and the stability of the foundation.
The technical scheme adopted by the invention is as follows: the utility model provides a take apron board annular crowd section of thick bamboo offshore wind power basis, includes top cap and a suction section of thick bamboo that is used for supporting the top cap, its characterized in that: the top cap is annular, the inner ring of top cap is equipped with the annular interior skirtboard that extends to suction section of thick bamboo one side, the outer loop of top cap is equipped with the annular outer skirtboard that extends to suction section of thick bamboo one side, and is a plurality of the suction section of thick bamboo uses the top cap axis to be the polygon distribution as the center.
Preferably, the top cover comprises a steel ring cover and a reinforced concrete ring cover, the steel ring cover is fixed on the lower end face of the reinforced concrete ring cover through shear-resistant studs, and a plurality of suction cylinders are welded on the bottom face of the steel ring cover.
Preferably, the thickness of the reinforced concrete annular top cover is 200 mm-2000 mm, and the thickness of the steel annular top cover is 3 mm-40 mm.
Preferably, the suction tube comprises a tube skirt vertical steel plate and annular angle steel, a drainage and exhaust valve is arranged at the top of the tube skirt vertical steel plate, a valve communicated with the drainage and exhaust valve is arranged on the top cover, and at least one layer of annular angle steel is welded on the inner wall of the tube skirt vertical steel plate along the axis.
Furthermore, the height of the cylindrical skirt vertical steel plate is 5-25 m, the wall thickness is 3-50 mm, and the external diameter is 3-20 m.
Furthermore, the side length of the annular angle steel is 10-500 mm, and the vertical distance between two adjacent layers is 100-1000 mm.
Preferably, the inner radius of the top cover is 10 m-20 m, and the outer radius of the ring cover is 15 m-35 m.
Preferably, the thickness of the annular inner skirt plate and the annular outer skirt plate is 3 mm-40 mm, and the height of the annular inner skirt plate and the annular outer skirt plate is 500 mm-5000 mm.
The beneficial effects obtained by the invention are as follows: the offshore wind power foundation can float on water by injecting high-pressure gas into the cylindrical foundation, supports the integrated transportation of the foundation and the upper fan, and saves the transportation cost; during installation, the negative pressure penetration installation method of the suction tube can effectively reduce the friction resistance of the tube wall and the resistance of the tube end, and the effect of reducing the friction resistance of the tube wall by combining the annular angle steel is realized, so that the installation efficiency of the foundation is greatly improved; compared with the conventional round cap-shaped foundation, the annular top cover reduces the steel consumption and the foundation cost, and simultaneously ensures the coordinated floating transportation, the coordinated installation and the leveling of the grouped cylinders; the annular top cover avoids the adverse effect of huge jacking buoyancy on the middle area of the conventional circular top cover, and the overall stability of the foundation is enhanced; the apron board of annular top cap has effectively improved the bearing capacity of fan basis operation period, has guaranteed the stability of basis effectively when reducing basic design size, reduction cost.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a cross-sectional view of FIG. 2;
FIGS. 4-5 are schematic views of the construction of the suction cartridge;
reference numerals: 1. a top cover; 2. a suction drum; 11. a reinforced concrete ring cover; 12. a steel ring cover; 13. an annular inner skirt plate; 14. an annular outer skirt plate; 15. shear resistant studs; 21. a cylinder wall vertical steel plate; 22. annular angle steel.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments.
As shown in fig. 1-5, the offshore wind power foundation with the apron plate and the annular multi-cylinder comprises a top cover 1 and a suction cylinder 2 for supporting the top cover 1, wherein the top cover 1 is annular, the inner radius of the annular top cover is 10-20 m, and the outer radius of the annular top cover is 15-35 m; the inner ring of top cap 1 is equipped with the annular inner apron 13 that extends to suction section of thick bamboo 2 one side, and the outer loop of top cap 1 is equipped with the annular outer apron 14 that extends to suction section of thick bamboo 2 one side, and a plurality of suction section of thick bamboo 2 use top cap 1 axis to be polygonal distribution as the center, and the thickness of annular inner apron 13 and annular outer apron 14 is 3mm ~ 40mm, highly is 500mm ~ 5000 mm.
In this embodiment, the top cover 1 includes a steel annular top cover 12 and a reinforced concrete annular top cover 11, the steel annular top cover 11 is fixed on the lower end surface of the reinforced concrete annular top cover 12 through shear studs 15, and the plurality of suction cylinders 2 are welded on the bottom surface of the steel annular top cover 11. The thickness of the reinforced concrete annular top cover 11 is 200 mm-2000 mm, and the thickness of the steel annular top cover 12 is 3 mm-40 mm.
In this embodiment, a suction section of thick bamboo 2 includes skirt vertical steel sheet 21 and annular angle steel 22, and drainage discharge valve has been seted up at skirt vertical steel sheet 21 top, is provided with the valve with drainage discharge valve intercommunication on the top cap 1, and the welding of skirt vertical steel sheet 21 inner wall has at least one deck annular angle steel 22 along the axis. The height of the cylindrical skirt vertical steel plate 21 is 5-25 m, the wall thickness is 3-50 mm, and the external diameter is 3-20 m; the side length of the annular angle steel 22 is 10 mm-500 mm, and the vertical distance between two adjacent layers is 100 mm-1000 mm.
After the welding of annular top cap 1 and a suction section of thick bamboo 2 combination basis manufacturing, install basic superstructure on land, adopt the integration to transport to the installation place, draw water and bleed air to a suction section of thick bamboo 2 through automatic atmospheric pressure adjusting equipment, the negative pressure sinks to appointed machine position.
The integral structure of the present example is composed of an annular top cover 1 and four suction cylinders 2 (as shown in fig. 1). The suction cylinder 2 is made of steel, the height of a cylinder skirt is 6000mm, the thickness of the cylinder skirt is 25mm, the outer diameter of the cylinder skirt is 6000mm, and a drainage exhaust valve is arranged on the cylinder top. Upper portion annular top cap 1 comprises steel annular top cap 12, reinforced concrete annular top cap 11, apron 13 in the annular, outer apron 14 of annular and shear bolt nail 15, is provided with the valve with 2 drainage discharge valves intercommunications of suction section of thick bamboo on the annular top cap 1, and reinforced concrete annular top cap 11's thickness is 800mm, and steel annular top cap 12 thickness is 6mm, and annular apron 13 thickness is 15mm, and annular apron 14 height is 2000 mm. The inner and outer radii of the upper annular top cover 1 are equal to the distances from the center to the proximal end and the distal end of the cylindrical foundation, and the inner and outer radii are 9000mm and 15000mm, respectively.
The soil-entering part of the foundation is four cylindrical foundations (cylindrical skirt vertical steel plates 21) welded with two foundation annular ribs (annular angle steel 22) respectively, the bearing capacity provided by the cylindrical foundations is high, and the cylindrical foundations can provide large bearing capacity for offshore wind turbines. The offshore wind power foundation can float on water by injecting high-pressure gas into the cylindrical foundation, supports the integrated transportation of the foundation and the upper fan, and saves the transportation cost; during installation, the negative pressure penetration installation method of the suction tube can effectively reduce the friction resistance of the tube wall and the resistance of the tube end, and the effect of reducing the friction resistance of the tube wall by combining the annular angle steel is realized, so that the installation efficiency of the foundation is greatly improved; compared with the conventional round cap-shaped foundation, the annular top cover reduces the steel consumption and the foundation cost, and simultaneously ensures the coordinated floating transportation, the coordinated installation and the leveling of the grouped cylinders; the annular top cover avoids the adverse effect of huge jacking buoyancy on the middle area of the conventional circular top cover, and the overall stability of the foundation is enhanced; the apron board of annular top cap has effectively improved the bearing capacity of fan basis operation period, has guaranteed the stability of basis effectively when reducing basic design size, reduction cost.
The foregoing shows and describes the general principles and principal structural features of the present invention. The present invention is not limited to the above examples, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a take apron board annular crowd section of thick bamboo offshore wind power basis, includes top cap and a suction section of thick bamboo that is used for supporting the top cap, its characterized in that: the top cap is annular, the inner ring of top cap is equipped with the annular interior skirtboard that extends to suction section of thick bamboo one side, the outer loop of top cap is equipped with the annular outer skirtboard that extends to suction section of thick bamboo one side, and is a plurality of the suction section of thick bamboo uses the top cap axis to be the polygon distribution as the center.
2. The offshore wind power foundation with skirt ring skirt according to claim 1, characterized in that: the top cover comprises a steel ring cover and a reinforced concrete ring cover, the steel ring cover is fixed on the lower end face of the reinforced concrete ring cover through shear-resistant studs, and a plurality of suction cylinders are welded on the bottom face of the steel ring cover.
3. The offshore wind power foundation with skirt ring skirt according to claim 1, characterized in that: the thickness of the reinforced concrete annular top cover is 200 mm-2000 mm, and the thickness of the steel annular top cover is 3 mm-40 mm.
4. The offshore wind power foundation with skirt ring skirt according to claim 1, characterized in that: the suction tube comprises a vertical steel plate of the skirt and annular angle steel, a drainage exhaust valve is arranged at the top of the vertical steel plate of the skirt, a valve communicated with the drainage exhaust valve is arranged on the top cover, and at least one layer of annular angle steel is welded on the inner wall of the vertical steel plate of the skirt along the axis.
5. The offshore wind power foundation with skirt ring skirt according to claim 4, characterized in that: the height of the vertical steel plate of the cylindrical skirt is 5-25 m, the wall thickness is 3-50 mm, and the external diameter is 3-20 m.
6. The offshore wind power foundation with skirt ring skirt according to claim 4, characterized in that: the side length of the annular angle steel is 10-500 mm, and the vertical distance between two adjacent layers is 100-1000 mm.
7. The offshore wind power foundation with skirt ring skirt according to claim 1, characterized in that: the inner radius of the top cover is 10-20 m, and the outer radius of the ring cover is 15-35 m.
8. The offshore wind power foundation with skirt ring skirt according to claim 1, characterized in that: the thickness of the annular inner apron board and the annular outer apron board is 3 mm-40 mm, and the height of the annular inner apron board and the annular outer apron board is 500 mm-5000 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911311603.2A CN110847216A (en) | 2019-12-18 | 2019-12-18 | Offshore wind power foundation with skirt board annular group cylinders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911311603.2A CN110847216A (en) | 2019-12-18 | 2019-12-18 | Offshore wind power foundation with skirt board annular group cylinders |
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| Publication Number | Publication Date |
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| CN110847216A true CN110847216A (en) | 2020-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911311603.2A Pending CN110847216A (en) | 2019-12-18 | 2019-12-18 | Offshore wind power foundation with skirt board annular group cylinders |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114875953A (en) * | 2022-06-13 | 2022-08-09 | 中国华能集团清洁能源技术研究院有限公司 | Suction type pile-barrel composite foundation |
-
2019
- 2019-12-18 CN CN201911311603.2A patent/CN110847216A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114875953A (en) * | 2022-06-13 | 2022-08-09 | 中国华能集团清洁能源技术研究院有限公司 | Suction type pile-barrel composite foundation |
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